Flt Lt Wales is the aircraft captain when the crew is called to an old slate quarry where a local boy has fallen dangerously off an old railway bridge onto rocks

Viewers are to get a close-up look at Prince William at work in his role as a rescue helicopter pilot.
He features in the four-part BBC reality series which starts next month.
Helicopter Rescue follows several search and rescue crews, including those based at RAF Valley on Anglesey where Flight Lieutenant Wales – as the prince is known – is based.
In the first episode, William, 30, will be seen captaining his Sea King helicopter to help save a boy who has fallen into an old slate quarry in Blaenau Ffestiniog.
The unnamed youngster has fallen from an old railway bridge onto an outcrop of jagged rocks below when the prince is dispatched to lead the rescue.
Williams, who is part of a four-man crew, is featured speaking on camera describing his role once the call comes in.
He says: 'As captain you’re trying to play out the entire rescue... in your mind and pick up any problems you can foresee, and try and fix them on the ground before you get airborne.'
William adds: 'There’s no greater feeling than when you’ve actually done some good and saved someone’s life. I don’t think there’s any greater calling in life... to be able to see a son or daughter’s face when you bring their mother or father back from the edge of death – it’s quite powerful.'
Winchman and paramedic, Master Aircrewman Richard Taylor, also describes just how treacherous rescue work can be, as a decision is made that they should winch the casualty on board the helicopter on a stretcher as the prince hovers overhead.
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In action: Flt Lt Wales is the aircraft captain when the crew is called to an old slate quarry where a local boy has fallen dangerously off an old railway bridge onto rocks

Bravery: Prince William pilots the Sea King helicopter as it hovers over the bridge during the rescue

Help: Winchman and paramedic Master Aircrewman Richard Taylor arrives on the ground to administer first aid

Danger: The victim is strapped to the stretcher before being winched back up to Prince William's helicopter

Care: The prince maintains a hovering position as the rescue unfolds below

'It’s a challenging procedure,' he says, 'and inherently dangerous to put a man on a very thin piece of wire, hanging underneath nine tons of helicopter that’s susceptible to turbulence and problems itself, and may have to fly away.'
The series will also show the prince’s day-to-day life at RAF Valley.
A spokesman for the prince said of his decision to participate in the four-part fly-on-the-wall show: 'Prince William is but one of many participants and his contribution is exactly the same as the other pilots.
'He is one of a team, and the team as a whole is the subject of the documentary, so it was entirely appropriate he took part.'
Palace officials are due to announce within weeks whether he will stay in the RAF after his three-tenure ends this autumn.
It is widely believed that, with his first child due this summer, William will transfer to a role nearer to London.

Pride: The prince said there is 'no greater feeling' than saving someone's life during the documentary

Real life: The documentary will give viewers an insight into the prince's working routine

Change of scene: It is widely believed the prince may transfer to a role nearer London for the birth of his first child this summer